I have been looking for the Servicing Manuals for these scopes. You mentioned that you have the servicing manual for the V1050. Any chance that you could scan me a copy please.
Incidentally, there should be no problems whatever over getting suitable probes. The scopes are almost sure to be 1Mohm input. Any standard 10:1 probe matches to 1Mohm, so will do. Plenty of suppliers. Ebay seems full of chinese ones, all claiming 100MHz as if you could use any old scope to read that signal, which is almost meaningless, as it is the bandwidth of the scope that is important. In UK, Radiospares, Maplin, a quick web search. I'm sure the same in States.
BillN m0wpn