Maillard down sizing to 7 speed?

[Way2many]

I'm trying to reduce an 8 speed fw to 7...the 8 has got the very last sprocket screwed ito the next one alongside it.

What I need is a final 13T sprocket that only secrews to the block.

Any spare parts out there?

 

[sawston_vulcan]

I have a Maillard-Sachs 13-19T 7 speed freewheel in excellent condition...save the faff!...pics on request.