[urq] Brake servo parts list available?

[MikeDes156 at aol.com]

Last year I managed to get a good (at the time) used complete brake servo  to 
replace my leaking unit. It wasn't to difficult to replace, other than the  
fact that it was from a RHD car so I needed to change the shaft. Now after 
about  8 months, this brake servo is also leaking. I know the rebuild kit that was 
 offered at one time is no longer available. Has anyone compiled a list of 
the  sizes of o-rings and oil seal needed so we can put together our own rebuild 
kit?  If I had a good set of micrometers, Id try and figure out what sizes we 
need. At  least if we knew that, we could find the parts and do it  ourselves.