The Cheap Beep Project has transmitter kits at $15 and finished transmitters as available at $25. Scanner receivers available when stock is in hand.
Payment can be by PayPal to my E-mail account. Best to contact me direct at: tom@munson.us

See attached table for full list of available items.
Stock on hand 3-21-2016.pdf

MAXI Transmitter Kit
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Middle right to middle left: epoxy resin, epoxy hardener, gel solder flux, 0.3mm flux core wire solder, solder removal wick, transmitter parts on a 3X5 card, antenna strain relief and battery sleeve, magnet.
Top: antenna kit and premade/example antenna
Bottom: Shrink tube for extra battery sleeves