First ST50, some bits missing

Hi, While trying hard not to buy a project or projects a friend gave me the number of a guy selling a pile of parts that added up to an almost complete 1970 ST50, and a 1974 ST70, 48 hours later I have many boxes of bits sat in my shed and today started putting pieces together. I am missing the bracket(yoke) that sits on top of the forks and the handlebars attach to, and various other parts to complete one bike, the st70 frame has its V5 and I will probably sell that on to fund finishing the 50. Does anyone know where I can get a yoke bracket, or one I could borrow to draw in CAD and get one made? thanks in advance

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Should be able to get the top yolk on eBay, they do come up but are not the cheapest part.
I think I have a spare somewhere but would have to check.

Does the 50 have a v5? If not you may want to consider keeping the ST70 and log book.
If you do sell the ST70 frame and v5 what are you looking to get for it?

The 50 has a dating letter from VJMC, I don't know what the other frame and logbook are worth to be honest so while I build the 50 they can rest here at home, thanks