Mark,
My spouse found some replacement wheels that worked (with a shim/washer) via Ebay. My husband is dictating this to me, and said to go to Ebay and search: Replacement luggage wheels and the ones that he got were 68mm x 24mm x 6mm, and you wind up needing to add a shim (a washer). But, it took the equivalent (I exaggerate) of open heart surgery to take the suitcase apart for installation. He said it was not really a major problem, but you have to drill out rivets and then find replacements for rivets (best to use stainless steel). He said the rivets are not standard size., and he said it is very hard to install stainless steel rivets with a standard rivet gun, and the rivet gun could be damaged in the process....so best to have some experience in that regard. He said aluminum rivets could work, but just would not be as strong to last as long.
Spouse just checked old records re: the rivets he ordered on Amazon, and he is reading to me that they are: 610LF (stands for Large Flange Stainless Steel).
Here: my spouse just sent me an email with all this,that I am copying and pasting below. He said this is what worked for our suitcase and he said he cannot guarantee that these are what you need...just need to do your homework. He said going aluminum might be much easier, as he has said three times while I am typing how hard it is to use the stainless rivets.
Mon, 19 Dec 2016 Rivets for Rick Steve Luggage:
1) POP Rivet 610LF Large Flange SS - 3/16" x 5/8" Grip (.501 - .625) Qty-25
Sold by: Raw Products Corp $15.00
2) POP Rivet 68LF Large Flange SS - 3/16" x 1/2" Grip (.376 - .500) Qty-25
Sold by: Raw Products Corp $15.00
We now have my sister's old RS suitcase that she was going to discard due to a malfunctioning handle, so we have back-up wheels for future use.
RS store kindly sent a replacement case to us, which was before my husband was ultimately able to hunt for and find replacement wheels and then figure out what else was needed....washer/shim and rivets. But, as you can see on-line, the new suitcase is so much smaller....we just have not used it....I prefer the old model for anything other than a 1-3 night trip. RSteves staff had us send photos, so they could tell the suitcase was not abused...almost mint...we hardly ever checked it and may have never checked it..just do not recall doing so. They told us they had experienced some manufacturing issues with the wheels. Ours probably died sooner than yours, just because for several years we took 3 big trips each year...it was a very well-traveled, but much loved suitcase, and still is. Still looks almost mint condition....both of ours do.
Good luck!!! Hope it works for you...........the suitcase is priceless and a keeper in our opinion....worth the ole college try. My spouse is one of those guys who can fix darn near anything.
Note: I am just assuming your old rollaboard is the same a ours.......ours was from the mid-late 2000s....likely 10 years or so ago +/-. I did not open your link (sorry, but we just don't open links to things we have not personally searched on line...thank you for understanding.)