My throttle pedal was sticking a little so with the carpet out I thought it would be the right time to disassemble it, clean it and replace the bearings. Quite a lot of parts just for the throttle pedal.
The needle bearings were indeed seized and everything was clogged with carpet dust and was a little rusty. The needle bearings are a standard size and readily available. My new ones were HK1210 12x16x10 from VXB.com and cost just over $20 for four. Below: cleaned up and part re-assembled. One bearing in, three more to go.
Below: completely reassembled.
Below: I also repainted the moulding that goes around the pedal as it was looking a little scruffy.