towbar question

[nelstert5]

hi guys
just recieved the westfalia tow bar from flea bay, not looking to fit just yet until the weather improves
ive fitted tow bars before,but this one has no bolts,everything else is there,the removable hook,key,cover,plug socket, etc,but no bolts
ive lookad at the fitting guide on pf jones,s site and it says i need 4 x m10x35 bolts and washers to match,i can can some i suppose, but being a tight bum im hoping that the bolts that i remove from the rear bumper re-inforcement bar will fit???
anybody know??
thanks in advance
nel