Timing chain guide rebuilder

Does anybody know of a company that rebuilds timing chain guides?
I'm rebuilding a 1968 Toyota 1600GT and the guides are worn and broken and no longer available from Toyota so my options are to have them rebuilt or adapt something from another car which I would prefer not to do.
Any assistance would be appreciated.
Harry Dodson

My first thought is to take the old ones to a good machine shop in your area. Most guides I have seen are relatively simple affairs, such as spring-loaded nylon blocks etc.

A good machinist/fabricator should be able to rebuild yours, especially if you have pictures of the new components, (ie: from a service manual)