A good quality and inexpensive option to OEM is Hiflo
Oil Filter HF 155 & 157- $5.00ea HF157 is the small filter
I can ship you some if you like
KTM: 06 KTM950S & 10 KTM450EXC (690E sold
BMW: 08 R1200GSA & 74 BMW R90/6
MONTESSA: 82 COTA 349 "The White Wonder"