Some cheap and highly available flash writer options. They all come with DOS/Windows software, not sure if they are usable in Linux. It would be very nice if flashrom could support them. I'd be willing to pay bounties for that.

1) EN25T80
example: http://www.amazon.com/dp/B00PQ3204U

2) dream-e.com devices http://www.dream-e.com/index.asp?TypeID=6
OnePro http://www.dream-e.com/Pshow.asp?Pid=44
DreamPro2 http://www.dream-e.com/Pshow.asp?Pid=43
OnePro SPI http://www.dream-e.com/Pshow.asp?Pid=8
MiniPro SPI http://www.dream-e.com/Pshow.asp?Pid=7

3) CH341A
http://www.aliexpress.com/item/24-25-series-CH341A-EEPROM-Flash-BIOS-DVD-USB-Programmer-Software-driver-C1B5-Free-Shipping/32224996268.html

4) TL866CS
http://www.ebay.com/itm/221092473435

5) EZP2013
http://www.aliexpress.com/item/Free-Shipping-EZP2013-Update-from-EZP2010-high-speed-USB-SPI-Programmer-24-25-93-EEPROM-25/1743579133.html

6) EXP2010
http://www.aliexpress.com/item/Free-Shipping-EZP2010-high-speed-USB-SPI-Programmer-support24-25-93-EEPROM-25-flash-bios-chip/1751554787.html

7) SIOC-8 clip, with soldered ribbon cable and board for inserting in progammer socket, could be used by the above
http://www.ebay.com/itm/141377097279