I agree, call Starrett or email. They've been very kind and helpful over the years.
One Christmas, Starrett sent me a new set of tool makers buttons, free, after I inquired about them.
I've also gotten a few small parts, some free of charge.
Sometimes it takes them two weeks or so to get back to you. but they always do.
The Starrett telescoping gages are the best I've seen., but you must be careful and not strip the fine threads. Parts are available, but it may be cheaper to buy
the individual gage. I keep my sets lubricated with Starrett M1 or SuperLube. I bought my Starrett set for $60 in brand new condition., Ebay.