CoronaJoe,

Sounds like a parts machine might need to be in your future. 


 

I may be able to help - I have an SG1 'parts machine'.  However, I am in England so postage could be expensive.

you could make a whole machine from two parts machines!

Update.  Everything is back together and adjusted.  The sloppy platen was easily corrected by putting a thrust collar in its proper place.  The sheet loader gear on the platen shaft seemed to have a lot of sidewise slop so a copper "shim" inserted kept it in full contact with the main gear.  The white-out deluge was easily removed with Xylene and the card holder cleaned up with no damage to the plastic.
I found the carriage tension in the spring motor was cranked up to over 1.5 Kg or over 3 lbs!!  I backed it off to about 700g and it moves easily with no hammering on the escapement and goes full travel with no spacing or tab problems at all.

I can easily see this as a day job machine and who ever invested in them thought well of their clerical staff. 

2 minor things to do down the road.  Put some sound proofing back in; the old turned to dust.  And find bits and minor parts such as a bail lift handle.  I'll also have to relearn posting pictures here.