Is there anywhere I can get all the wormsgames for PC?

Yes, the official T17 shop (https://secure.team17.com/) has them.

Check the multipacks (https://secure.team17.com/browse.html?area=selection&productid=24&platform=PC/MAC) for extra bargain.
Especially the Field Marshall pack, which contains W2, WA, WWP, W3D and Forts.

Worms Blast and Addiction Pinball (contains the Worms table) are only available alone but W4M strangely isn't available from the T17 shop at all.

Don't buy the Trymedia/Trygames versions. They are overpriced rip-offs and are not patchable.

If you want to get W1/R/U you'd have to look on EBay or Amazon.

ok, thanks