need to replace bearing of powerdyne(s/c)

[sch4400]

I need to replace s/c bearing of headunit(powerdyne bd11a) and check up the impellar. cause the headunit make a noise. It's getting better.

I know the 928motorsports guys work for that.
but I just want to find the shop in locally.
I was googling, but I did'nt find , that's too hard to me.

please, give me some info. thank you.