Anything from the Vixen Vixskin line is about as close as your going to get in terms of squish, firmness, bendyness and heat transfer. When my bisexual gf and I tried it for the first time the first words out of her mouth were "oh my god it feel so real". This is backed up by dozens of reviews and bloggers claiming the same thing.
Vixen products are also top of the line silicone and are 100% sterilizable and are extremely resistent to tearing, breaking or shedding. Even better they don't smell and wont pick up any weird odors or discoloring.
I have two of their products and for the last 2 years have used them almost exclusively because they're just so good, its hard to find anything else that can beat vixen. The only issue is....they're pricy for a no frills dildoe. However, I have never once regretted the purchases.