Wanted for Crossley gas engine

[Tandem Compound]

To complete the restoration of my Crossley G112 gas engine of 1921 I need the gear guard that covers the gear on the crankshaft that drives the gear on the side shaft. I am interested in buying a spare, or if you know of one that I could borrow for pattern making purposes I'd be grateful. I know loaning parts is a risky business therefore I am happy to pay a deposit, returnable upon safe return of the loaned guard, and to sign a loan agreement. If you can help please contact me either through TT or phone 01282 412555 (work / day) or 01282 451575 evenings.
Thanks and kind regards
Alwyn Rogers