Unfortunately you don't just buy a remote unit made up (at least not from the store). It consists of a potentiometer (I used 10 kohms), a knob, a switch and a box to mount it in, all of which are available from Jaycar, if they're handy, or online. Some of the VFD's have a removable control panel but I don't think it's a good idea to try and mount it remotely. I used a 3-way switch to give me forward and reverse but after wiring it up it struck me as pretty pointless having the grinding belt going backwards!! I'll probably replace it with a simple on-off switch. Pity we don't live closer, instead of 3,000 kms or so, but I'm happy to help in any way I can. If you get stuck with the remote bit I can make you one and send it up.
I've been looking at the cheaper VFD's on ebay and all of them that I looked at had 220v input and 318v for the 3-phase, and while they obviously work we use 240v and 415v for 3-phase - which the one I bought from Conon is rated for. I'm thinking that I should buy another one of those for the lathe (I'm undecided). I noticed that the lathe motor has a squeak, which is not good.