Seen that Pedros and Park are making chain whip pliers but does anyone do a cheaper version (Superstar/lifeline/jobsworth prices). My chain whip is bent and the plastic handle missing so before I buy/make another one I was going to see if there were better options.

Used the Pedros ones, work well

Decathlon do a different option. http://www.decathlon.co.uk/chain-whip-cassette-remover-id_8309913.html

I have the Decathlon one and it works great, much better than a standard chain whip.

Decathlon one here also, spot on.