I don't know, but do HRS, Monarch, Rob Sport or EJ Ward supply one?
I know Tony used to do one.
Surrey AO and Triumph Hoover, Location: Guildford - Surrey, Spitfire 2.5PI - 1967 having surgery, PI Saloon- 1969, PI Estate - 1969 (to restore), Stag - 1971, PI Saloon MkII - 1971(stalled project), Sold some cars!
Here's mine with a TR6 spoiler - I used the fibreglass replica from Paddocks, which meant I could trim the centre part to the Stag valance profile.... quite "period" and subtle, and makes a huge difference to cooling at speed
77 Stag, Java Green with TV8, Strombergs, ZF 4 speed auto, 3.45:1 diff.
67 Vitesse 2 litre saloon in gunmetal and rust (the Pocket Rocket) - tatty but huge fun
72 MGB roadster auto - body now straight and resprayed, now awaiting MGF electric power steering fitment when I get some time.
'00 Honda CR-V auto as family hack
98 Honda Prelude auto - up for sale if anyone is interested