Yes let me have the number engraved on the inside.
According to the part number catalog for a T3, the specific part number of the lid should be 18200802.
I think the engraving will show 18200801
You need to specify which inside parts you need.
I rebuild gerboxes as a hobby - but due to I live in Norway with a high shipping cost for gearboxes to USA, it will probably not be a good idea to purchase a rebuilt one from me.
Rolf