I've used these two on ebay for thicker ended spring bars (1.1 & 1.2mm) for Seikos. Outletgoods and twente(0)
http://stores.ebay.co.uk/outletgoods/
http://stores.ebay.co.uk/fascistainl..._fsub=11625467
Can't you use the current bars in the strap? Bit of silicon and lot of push.
I've used these in 20mm and 22mm.
https://www.ebay.co.uk/itm/5-x-SPRIN...item51b88cd636