Sony released a bevvy of Dead Rising 2 themed goodies on PlayStation Home today in anticipation for the game's release (September 28 for NA). Included amidst the accessories and themes is the ever adorable Servbot helmet, an iconic item found within both DR1 and DR2, whose likeness is based off of the little bots from Mega Man Legends.
The helmet, and the rest of the DR2 goods, can be purchased directly from the PlayStation Home Mall. No price was detailed so you'll have to go and investigate it for yourselves. Let us know all the details if you can!
Thanks for the tip, Huriccane Wolf.
Source: PlayStation Home Blog