Vintage Kyosho F-1 front wings

[Team No Idea]

I know its a bit of a long shot but i have a BNIB Kyosho Williams FW14 1/10 car but the kit is missing the front wing. I would like to say i can get the part number from the instuctions but they are all in Japanese!
I realise it is going to be nigh on impossible to get one as the kit is so old but can anyone point me in the right direction?

Thanks