i remember the lotus frames/bikes, they were indeed made by british eagle the same people who did the "boss" bikes, nothing wrong the those particular frames at all, the ones in green/polished i thought looked really nice. the headesets were 1 1/4, what you can do is get some heaset reducer inserts, that way you can fit whatever 1 1/8 headset and fork that you like.
http://www.jensonusa.com/store/product/ ... ducer.aspx
here's alink to what i'm talking about but i think st johns street cycles do them aswel.
the king solution is very good but also very expensive, this is a budget but viable solution. had one in my aluminium O when i first got it and it worked fine. basically they are shims to reduce the internal diameter to that of 1 1/8
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