what are the other options besides the sleeves installed at places like golden eagle, that are an arm and leg...

I have head of local machine shops pushing in iron sleeves to replace the FRM in the H blocks.... any thoughts.....

 

I have had a company in england do just that.
Got some sleeves from germany and had them machined to what i needed. The sleeves are used in Jaguar competition blocks so are more than up to the job.