APACER 8GB IDE DOM 44-Pin 90 degree Jumperless 8C.4DD46.8256B for HP THIN CLIENTS  - PN:659067-001
This tested  HP component is compatible with T5730 T5735, T5740, T5745 T510 T610 thin clients and others. 
This standard 44 pin 8GB DOM makes a good upgrade for many other units such as Dell / Wyse X90L, R90L, FX130