I'm Suprised that no one mentions that d20 Future already has a conversion of the Drastlites.
Dralasites share the following species traits:
Type: Aberration,
Size: Medium-size. Dralasites have no special bonuses or penalties due to their size.
Ability Modifiers: -2 Dexterity, +2 Constitution. Dralasites are resilient but awkward.
Speed: 20 feet. Due to their amorphous form, dralasites move slower than humans and other beings of similar size.
Armor Restrictions: A dralasite cannot wear armor designed for other species. Armor designed for dralasite use is more expensive than normal, taking into account the species' unique physiology;increase the armor's purchase DC by +1.
Darkvision (Ex): Dralasites possess darkvision out to a range of 60 feet. Darkvision is black and white only but otherwise the same as normal sight, and dralasites can function with no light at all.
Elasticity (Ex): A dralasite's stretchable skin is supported by a complex muscle structure. Regardless of its shape, a dralasite's body cannot be thinner than 1 foot and cannot expand beyond a width of 5 feet.
A dralasite can "grow" arms and legs to use for handling objects and walking, and it can reabsorb limbs that are no longer needed.
A dralasite can grow a number of limbs equal to 5 + its Dexterity modifier (maximum 8). The dralasite must decide whether a limb becomes an arm or a leg when it is grown. Growing or absorbing a limb is a move action. A limb can be up to 3 feet long and no less than 3 inches thick. "Fingers" for handling items can be up to 3 inches long and no less than 1/2 inch thick.
A dralasite does not gain extra attacks for having extra arms. However, it can use its extra arms to grasp items, including weapons, which then don't need to be drawn or stowed. A dralasite with three or more free arms gains a +4 bonus on grapple checks.
A dralasite with no legs or more than two legs gains a +4 stability bonus on checks to resist bull rush and trip attempts.
Scent (Ex): A dralasite gains the scent ability (see page 228 of the d20 Modern Roleplaying Game).
Skill Bonuses: Due to their inscrutable facial expressions and their uncanny knack for reading others, dralasites gain a +2 species bonus on Bluff and Sense Motive checks.
Vulnerability to Gas Attacks: Due to their heightened sense of smell, dralasites take a -4 penalty on Fortitude saving throws made to resist gas attacks.
Free Language Skills: Read/Write Dralasite, Speak Dralasite.
Level Adjustment: +0.