There is a dealer near Kettering who might have one, has a lot of Jimmy parts. Send me message if you want to contact him, not sure if I should put his details on here.
Regards
Rob
CCKW 352-399807-B1. No 7 Set Fitted.
CCKW 353-359616-1. Shopvan. ST5.
Dodge WC53 Carryall 81577831(Sold)
Gemco 1/4 Trailer 1879.
CCKW Cab (only) under restoration.