Do yourself and the other people on the road a favor and buy the correct lug nuts. You could put wing nuts on those wheels and I guess they would work too, but, they were designed for one specific style lug nut, with a shank that centers the wheel, and a flat washer to spread the load. Anything else is not correct. If you want a different style after market lug nut, take the wheels to a machine shop and have them milled for a press in steel insert that will properly fit an after market lug nut. I think you'll will find the stock lug nuts much cheaper than doing that. In my view there's much better places to try and save a little money than mis matching wheels and lug nuts. Anyone that sells these wheels (Rimmers, Vic Brit, etc) has the correct wheel lug nuts, there are not the hard to buy. Also, there are a lot of used ones around from all the people that put the much improved stainless steel ones on their car when they were being made in GB by a forum member. The earliest of these wheels are 32 years old, have been over torqued I'm sure several times, have microscopic cracks, etc, why stress them more with the wrong nuts. Rant over.....
TR8