What sort of handlebar did you have in mind? I believe you mentioned having a "Titan" stem in an earlier post... I have an alloy Titan bar. Belgian made, I believe, but they were imported and marketed in England by Ron Kitching during the 1960s. Has a with a VERY wide/thick center ferrule size: 27.0 mm. (to make it super-rigid), but otherwise is around 23.4 mm (for normal brake lever bands). - This bar really does require a specific stem with a very large bar clamp opening... which I believe was also only made by Titan.

• Drop me a note if my bar might be of any interest to you. [I may eventually just offer it on eBay... but what a shame - appears to be in MINT/NOS condition - and very pretty.]