here is one
http://elexp.com/tst_1802.htm Variable DC Power Supply
LCD Display
Model HY1802D - 0-18V; 0-2A Model HY1803D - 0-18V; 0-3A
* Voltage Adjustable: 0-18Vdc
* Current Adjustable: 0-2A (HY1802D); 0-3A (HY1803D)
* Constant voltage or current operation
* LCD displays both current and voltage
* Current limiting and short circuit protection.
* Load Effect: less than or equal to 0.01% + 5mV
* Dimensions: 9" x 6.3" x 3.7"
* Weight: ~10 lbs.
$58.95 USD
*****************************
Or this
http://elexp.com/tst_3010.htm (this one is on my bench) Works great but horrible instruction to assemble if you get the kit.
DC Power Supply Model 3010 / 3040
The 3010 DC Power Supply features 3 regulated DC supply outputs. One output is fixed and 2 are continuously variable. All 3 supplies are fully current limited and shortcircuit protected. Available assembled or in kit form.
SPECIFICATIONS
Fixed Output:
5V DC at 3 amps maximum line regulation of 0.2% load regulation of 1% with a maximum ripple of 10mV p-p.
Variable Output:
+/- 1.5V DC to +/- 15V DC at 1 amp maximum, line regulation of 0.5%, load regulation of 1% with maximum ripple of 10mV p-p.
65.00 as a kit or 79.00 Assembled
***********************************************