There's no such thing. If you want to buy just a ROM you have to socket your tcu yourself. There are instructions in phils tcu thread and on phils website.
http://www.subaru-svx.net/forum/show...ght=shift+maps http://www.alcyone.org.uk/ssm/tcumod.html
I also sell the complete tcu with my shift maps and your choice of rev limits/full throttle shift points so you don't have to socket your own tcu.
http://www.ecutune.com/tcu.htm