I don't know if this is early enough, quite a find, not cheap https://m.ebay.com/itm/NOS-Stanpart-AM-Radio-Kit-Antenna-Case-w-Speaker-Triumph-TR4-Spitfire-V350/182850395673?hash=item2a92bb9e19:g:nXQAAOSwZ~JZ467F No personal knowledge or interest, just saw this browsing eBay the other day Greg Lemon TR250