Anyone know the dimensions of the PSU that comes with the Acer Aspire E380 for replacement purposes? Thx!?

In a time crunch and need to get the dimensions for the PSU for the E380 that's on its way so I can have the power supply on hand when it arrives. Looking at a Thermaltake unit that is 5.9 x 5.5 a 3.4 and just want to make sure it will fit inside the case with no issues because I'll be adding a video card to the system, as well, and the box ships with only a 250w supply, according to Acer's site. Any help would be greatly appreciated! I have another question about this system and it's ability out of the box to do some encoding of 120 minute length video (MPEG to WMV), but I'll post a second question to address that. Thanks so much for any answers anyone has! :)