Did you find any that are HO scaleI think that engine was cut up for scrap as part of a settlement with the EPA.
I found this link to a model of it, though it does have a different road number:
Atlas 48363 N Scale BPRR GP9 Diesel Locomotive w/o Decoder #202
Introduced in 1949, the Electro-Motive 1500hp GP-7 combined the machinery of the F7 with a hood-type carbody that offered high visibility and easy engine access. The GP-7 was used in pulling every conceivable type of train and was sometimes substituted for part of a set of cab units. The GP-9...www.trainz.com