I have a number of PocketWizards, three Plus III and a Plus X, so I thought I should upgrade the Plus X to a Plus III, so after a bit of hunting around for the best price I ordered a Plus III from https://www.photospecialist.co.uk, who I have used on a few occasions. Within 48 hours I have my grubby hands on a Yellow Plus III. Until I went looking, I never realised that they did them in different colours. I am thinking that I may have to invest in another Yellow one for use as a remote release for behind the goal work.
The only downside is that I have to downgrade the firmware on the new remote to enable it to work with my older remotes. It is either that or pay $10 per remote to upgrade the old ones. Whilst there are quite a few changes to the “E” Release firmware, there is nothing that would appear to change the way that I use them. If in the future I decide differently I will upgrade the firmware.