Have a word with the club?
Make it win-win, tell them we'll buy up the remaining stock of white ones online if they agree to switch to red.
They make money getting rid of stock, we get our own way.
I have often though more effort should be made to co-ordinate the design and colouring of the two (and occasionally three) season kits.
i.e. So if you had a red/white home, a black/blue away and a white/blue third, the socks, shorts and shirts design and colour match up, so you could mix and match and come up with a multitude of combinations.
Or is there a ruling whereby we register our colours for the season and unless there's a clash that's it?