I didn't have any issue running speed density with either the stock 0.2 to 2.5 bar or a bosch 0.2 to 3bar sensor I mentioned above. I never found a TMAP sensor that gets down to 0.2 low side and more than 3+ high side so if you want more boost and speed density tuning something like the AD-ENG solution would work fine.
Are you referring to their dual sensor harness that has a 5 bar connected to a couple of the leads and also the stock sensor connected(I think?)