Nitrogen refill in Detroit area

Hello,

I want to service my king shocks this winter and I am looking for a place to get them refilled with nitrogen in the Detroit area.
Does anyone know someone or some place who does this?

Also what price should I expect for one shock?
When it is too much then I am probably just ending up buying a kit.

Thx

 

I just paid $10 a shock for nitrogen to 150psi. Check any of the dirtbike shops, if they service rear dirtbike shocks then they will have nitrogen.

 

Also on a side note...In case I am ending up buying a kit could I also use it to inflate my tires while on a trip? This would probably justify a purchase even more.