Many if not most of the ICs in either a Mk II or a Mk2A are "unobtainium". You are no better off with a Mk II vs a Mk2A in that regard. Some have said that the MkII is more reliable than the Mk2A, but I have never seen an explanation for that contention. If your unit has never been serviced, it is a good idea now to replace at least the electrolytic caps in the outboard power supply. IMO, there is no need to use "audiophile" quality caps for this purpose. Panasonic TS or FC types are superb for the job and cost a few bucks. If you want to go all the way, then also replace the lytic caps in the onboard electronics box. This effort will probably keep your tt running perfectly for another 25 years. Most of all, it will protect you from failure of irreplaceable ICs. Also, with the internet as a search tool, it is not necessarily true that you cannot find the ICs somewhere in the world. I recently was successful in finding an IC for my Denon DP80 that had not been manufactured since 1983 and for which there are no drop-in replacements, in Hong Kong I got two NOS ones. Don't let anyone scare you out of enjoying your find.