Rubber seals for hard top windows?

With better weather now I need to replace the rubber window seals in my hard top - the fixed side windows, the long thin alpine roof side windows and the two either side of the back door. Has anyone done this and can recommend where to buy the seals from?

I see you can buy them as a complete seal (per window) but I think I would be better buying it by the meter as I don't know if the side windows were put in at a later date and I guess they might possibly have been cut wide and need an extra inch or two in length. I see that you can buy them at LR Series but including the filler channel and vat it's over £10 per meter which seems steep.

Also there a handy little tool, diamond shaped for putting the seal in. Available from a company called laddaws.

Thanks - yep, got one of those on my list too