go to a o-ring/hydraulic shop, not a gunshop, if u know how to strip her down get the set off the gun, then take them to the o-ring shop, u may have to wait 4 a few if there not in stock, but u see that they r a few pence each, not £,s,
if u need a place to get them, let me after next week, i can get them 4 u, if u bag up wots needed and set to me, i get u a little bag of each needed, al