89 LTC power stering pump leaking

[89ltcsignitureseries]

I want to know where i can order an part online that is resonable, its not leaking that bad (sipping alittle), can i add stop leak without replacing the part?? or ??

 

[Black87LSC]

I wouldn't put any stop leak in it, I think it would be too coarse for the pump. Is it leaking right at the line that comes out of the pump?