We've searched the internet and found the largest collection of On30 Scale trains for sale is on eBay. Below are the listings for 'Switcher'.

BLACKSTONE MODELS HOn3 B370112 Switcher Pilot Assembly for Blackstone K 27
BLACKSTONE MODELS HOn3 B370112 Switcher Pilot Assembly for Blackstone K 27
$26.99
Time Remaining: 29d 4h 39m
Buy It Now for only: $26.99

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BLACKSTONE MODELS HOn3 B370112 Switcher Pilot Assembly for Blackstone K 27