Hi mate, RGH1 is what you need, you can use your SPI flasher you have now, but I dont think you will be able to program the chip with that spi flasher.
So you would either have to make a programmer cable, buy one, buy a pre programmed chip, or buy another SPI flasher.
I only use the TX products, so Coolrunner Rev C or the new CR3 Lite is what I'd reccomend. There is no need to get a CR3 either as it offers nothing more to you, even a Rev A ot Rev B of the coolrunner will work for you too so maybe have a look on ebay.
But there are alternatives, Matrix Glitcher, Squirt 360, X360 gltich chip, probably more but can't remember them lol.
I'd recommend a Coolrunner rev C and a jrunner programmer (coolrunner cable comes with this). Souldn't cost over £30/$50/45 Euros delivered.
Where are you located?