tobytrees

I have a large number of older HO rolling stock from Riko, Kleinbahn and other european manufacturers that have what is now over sized wheel flanges that cause problems on to-days track. I am therefore looking to replace them. Problem - they are all 39 or 40 inch whereas most the the current sizes available in the UK are 28 - 36 inch. Does anyone know where I might obtain some wheelsets of these larger sizes, preferable metal which will run on todays track. Thanks.