New member with old bike & problems

[Catsick]

Hi all, about time i joined in the hope of getting my E-Aspect roadworthy again. The forks finally gave up the ghost recently so am looking at or rather for alternatives but there seems to be a drought on and things very hard to find in stock. Originals are tapered rock shox 9qr 100mm air and have failed internally, will not hold air at all, pump it up and it blows the fork seal. What alternatives are possible? Perhaps shift to 15x100 instead? Coil? thanks for any advice provided