If you want incandescent amber replacements, try
these. The envelope is a different shape (which might not bother you anyway), but they ain't cheap.
Have you tried a dealership parts department?
If you'd rather have LEDs, try
these. I swapped the amber originals for a pair last autumn, and they're just the ticket. No errors, not chavtastically over-bright and they're a good solid orange rather than a washed-out lemon yellow like some seem to be.
Nine months later they're still working properly.
.