This might be the highest-quality necropost that I've ever seen.@4501 Safari created a great thread. Despite its dating back to 2010, it helped me find the right damper to install on my new-to-me 1996 FWB (the damper still works pretty well, but it's one of the few "consumable" components on my car that has not been replaced for years and so I will change it as a precaution).
The current offerings, AFAICT, seem to be down to just two--the KYB and Monroe appear to be gone:
1. the AC Delco 509-608, which is available from GM Parts and from Rock Auto, among others;
2. the Moog SSD77, which is out of stock at most of the reliable online retailers (Summit, O'Reilly, etc.), with stock refills anticipated to happen in 2-8 weeks. Luckily, I found one left today at Rock Auto this afternoon for $53.25 and bought it.
The listing on the RA website has (temporarily) been removed from the site. Here is the link as it was this afternoon. It will be interesting to see whether/when stocks will be replenished. If not, then it's down to the AC Delco--which is unfortunate for Roadmaster owners, as the Moog part is said to work better on the RMS/RMW than on the Fleetwood.
You will be spared.