I know this is an old thread, but my NH TC26DA uses pedals like that. It is 9 years old now, 600 hours, and I've gone through two sets and need new ones, and I am absolutelly, positively not going to spend $46 plus shipping for new ones. If they were a standard auto size, replacements could be had for about $5 apiece, and this rip-off is one of the reasons, all part-cost related, because the tractor is very good, that I won't ever buy New Holland again. I lost a knob once on the end of the loader lever, and luckily found it after about 2 hours of looking in the snow. I laughed that I had wasted all that time on a $3 part, and went to check, and found out that a threaded round knob about 2" in diameter was a $20 (+ shipping, of course) item. The list is endless. Want to replace loader parts? Forgetaboutit. From what I have seen, Kubota is a little bit more fair with parts, though still outrageous, and I'll likely go with an L series compact if I live long enough to ever get another tractor.
The companies keep changing models so quickly, imho, mostly because they don't want an "8n situation" where one model sells so well that other companies start making replacement parts. It's a damned shame that business as usual has become such a nasty thing. NH even makes identical tractors under Case name with parts just different enough so they are not interchangeable! Shame! Sham!