cocking hook question

[charlie cleveland]

i have a p grade 10 ga parker serial no 114xxx made between 1901 and 1902...the problem im having is the cocking hook is not cocking the hammers...i fixed this problem for a while witk a shim but shim dont help anymore...i have took the cockink hook off the barrel to tig weld it...i looked at two other parker guns cocking hooks they are similar but not the same. the two i looked at have a groove in them the whole length of the cocking hook...the 10 ga only has a small grove of about 3/16... has anybody had any luck welding the cocking hook and does it hold up... or does anybody have a cocking hook in good shape for sale... charlie