It is one of these: Linear Power Supply
For 115VAC locations. Output is 19VDC, 5A, 100VA. Will come with stock umbilical cable and will include an adapter that makes the size compatible with Dell power supplies. This adapter is what I used to connect the LPS with a SonicTransporter i7.
From the above link, you can see that it sells new for $147 plus $40 shipping to the US. Rather than $187, I will let it go for $105 including shipping anywhere in the US and including the Paypal fee.