Individual components are not available separately.

June 2012, From Tippmann Sports:
We are pleased to announce a programming update for the  X7 Phenom and A-5 Hall Effect E-Grips.  We have transitioned to this new programming in X7 Phenoms, X7 Phenom eGrip kits, A-5’s with a Selector Switch and the respective E-Grip kits a few months ago.  This new program not only enhances performance, but it also addresses issues that some players may have experienced in earlier X7 Phenom or A-5 markers.  Issues that some players may have experienced could include inconsistent behavior within firing modes, the need to frequently reset your e-grip or the board shutting down during play.

As mentioned, this new programming has been in play for a number of months, and was included on X7 Phenom markers with a serial number of 32, 534 or higher and 567,750 or higher on the A-5 with a selector switch.  If a player has not experienced an issue by now, it is unlikely they need to send the board back to Tippmann. However, if [a customer] has experienced issues with an X7 Phenom or A-5 Hall Effect E-Grip, we suggest [the player] contact us and we can arrange to have the board upgraded.