No need to replace the head. Aristo make a V54 replacement lamp for use with VC paper. You need model BES23C-LO-V54. Look for details here:
http://www.aristogrid.com/prod02CC_BES23C.htm

Available at the usual places for about $110. Much less than a new head! But, if you do not currently have a head, the @bay cost plus V54 bulb may make the new head a better choice.

Cheers,
Geary