A secret shop hidden in an Upper East Side commercial building has become a mecca for lonely hearts seeking to meet their new synthetic sex partner.

Customers who pay a $50 deposit can walk in and find a menagerie of 12 life-size dolls that cost up to $3,000 apiece — each one, 75 pounds of heavy silicone or more skin-like materials called thermoplastic elastomer — lounging on sofas and chairs in their best lingerie.

The strange showroom, and its companion website DollsYouCanTouch.com , is the brainchild of “Benji,” a 46-year-old entrepreneur who spoke to The Post on condition of anonymity.

He’s been leading tactile tours at his mysterious shop — the location of which he reveals only to the customers he has vetted — since July. He gave The Post a peek this week.

Customers sign a nondi

See Full Page