Need Source for Dash-8-102 parts

[ehtesham]

I am not getting the following parts any where. Only 1EA got as AR but i need NE/OH or other. Please help me finding this unit:

Item: APU/APC
P/N: 63D49-84552-1
Aircraft: Dash-8-102
Manufacturer: DeHavilland Bombardier

Would appreciate any other knowledge base information. I am new in this line and want to know from you.

Regards
Ehtesham