I went through trying to buy one, contacted the compny that made them in the UK.
I tried australia wide and new zealand and south africa, could not cind one new or used, seriously bad news.
My vz is a low kms car 2005 SV8 with 68,000 whwn i bought it.
I have the correct part number and for it is worth the label on the accelerator pedal is blue instead of white.
I messed up my throttle body by putting the blade back in the wrong way , which must have stuck which threw 3 codes up, i was to say the least extremely upset at my rookie mistake, why didnt i run a texta over the blade and shaft, i been playing with cars since i was 14 and im almost 60 now , anyway it is what it is, so i bought a scan tool off envious cutoms and it told me what was had it, it was the throttle controller which lives under the passengers footwell, so i got a new throttle controller and a new throttle body and fitted it all up , and fortunately the faults were gone, so all good, this all took a month, but the point i make is that i thought my throttle pedal unit was at fault so was rushing around trying to find one, but once i ran the scan i was lucky that it was other things, if you are sure the pedal assembly is at fault all good, if your not sure contact envyous customs here in WA its only about 90 odd dollars but a great tool to confirm what is had it, im an old guy and i managed to load the program etc, but believe me it was a steep learning curve, but without it my car would still be sitting in the driveway, no use to anyone. envyous customs is a forum sponsor on this site, i have no association with them etc, just telling you what worked for me and saved me potentially 1000,s really.
I hope some of this helps you mate, if not good luck finding a pedal, if you need the throttle controller from under the passenger footwell, i have a spare one, i bought 2 as they were the only ones for sale a month or so ago, .
For what it is worth i carefully pulled apart the throttle peddle assembly to check that no fingers were fused, and they were not, if they are, you will have never ending problems, also the black ink colour arcs in my case were good, if there is metal showing then they short out or something, although the mob in the UK say on there website there throttle units can do 2.2 million movements before problems arise