¿Dónde puedo comprar estas cosas en la ciudad de México?

¿Dónde compro estas cosas en la ciudad de México?

1) Tarjeta madre
Raspberry Pi Modelo A
http://www.dx.com/es/p/2-in-1-raspberry-pi-model-a-made-in-uk-acrylic-case-kit-green-370684?tc=MXN&gclid=CJ2_7fuQrcQCFdgZgQodzJcAIw
2) Dvd drivers
http://www.linio.com.mx/PLDS-HP-8X-External-DVDRW-Retail-DVD-Drives-1070203.html?gclid=CPLvhdGRrcQCFdgNgQodQAkANA
1 )AixiZ Laser Housing
http://www.ebay.com/bhp/aixiz-module
2 )Quad H-Bridge (SN754410)
https://www.sparkfun.com/products/315
1) 5V Voltage Regulator such as LM7805d
http://es.aliexpress.com/w/wholesale-lm7805-5v-voltage-regulator.html
8)10kΩ Resistors
https://www.sparkfun.com/products/8374
1)500Ω Resistor
https://www.learningpod.com/question/practice-question-for-physics/a1c7327c-4275-45d4-98b8-f0e55fa03562
1)6.8Ω Resistor
http://mx.rsdelivers.com/product/vishay/rwm06226r80ja15e1/vishay-rwm-6x22-series-axial-wirewound-resistor-68%CF%89-5-7w-75ppm-c/4852631.aspx
1)10µF, 0.33µF, and 0.1µF Electrolytic Capacitors
0.1µF https://www.sparkfun.com/products/8375
0.33µF http://www.alliedelec.com/1/products/223240-cap-0-33uf-aluminum-electrolytic-capacitor.html
5) 1N4001 Diode
http://www.adafruit.com/product/755
1)Power NPN Transistor
https://www.futurlec.com/TransPowerTIP.shtml
1)7-9V Power supply (over 2A preferable)
http://www.ebay.com/bhp/9v-power-supply