[Heathkit] Swap unbuilt Heathkit

[David B. Perrin]

I have a brand new Heathkit unopened kit. The Heath "Non-abrasive
Jewelry cleaning kit, model number GD-1151-H. Ultra sonic cleaner.
From the Heath Winter 1990 catalog number 219, page 27.
 I am in search of Ten Tec filters: a 500 Hz (285), two 250 Hz(282), 
a 9MHz-500 Hz (217) and maybe a 1.8KHz (288) How can we swap? I might
be interested in an outboard DSP filter as an alternative.
 73 de dave in NH