Tinkersphere stocks 3D printer replacement parts in NYC including extruders, RAMPs controllers, limit switches, heatbeds, etc.
Ever wanted to run your RepRap 3D Printer from an SD card? This RAMPS add on module enables you to print from a microSD card. With RAMPS 1.4 and higher it's easily connected to the RAMPS board. Reprap compatible.
Melt 1.75mm or 3mm filament for your 3D printing needs using this Hot End Extruder. Filament comes in one end, molten plastic comes out the other. Just give it 12V and you'll be 3D printing in no time. Reprap compatible.