McLaren f1

Aaah.... Pretty sure the Fujimi is your only bet, then.

They also make some niiiice-looking GTR versions which is more my style! ;) (And of course MP4-12C GT3's.)

Plastic wise in modern F1 I think that's your best bet. Older ones are made by Tamiya - 76 M23, 80's MP4/4, /5B, /7 and /8 (all of which anre red 'n white) and then the late 90's MP4/13. Not sure, but I also seem to recall that maybe Revell did one (but that will be in 24th) - but this is very much under correction.

Still beats the price of a 43rd or 20th multimedia kit! And the Fujimi F1 I have built, gave me zero issues I can recall.

Depends on which McLaren you are looking for. If you're after one of the old red and white Marlboro schemed Honda engined ones, Tamiya used to make a few of them in 1/20 scale although they are not being produced anymore but you should be able to find some on ebay. I think Revell makes the newer Mercedes engined ones, as well as Airfix a few years back although I'm not too sure what scale they were and how available they are, but again, ebay is your best bet.