If you're prepared to wait I've had great success ordering stuff from China via eBay. You get the buyer protection stuff and a system you're familiar with. For example, I just ordered a self-assembly ESR Tester Kit for £8.99 delivered. It'll be here in about 3 weeks, maybe 1 week, maybe 4. And as it's well under £15 including postage no import duty or Royal Mail rip off fees. Shame they don't do more pinball spares out of Hong Kong...
http://www.ebay.co.uk/itm/271479255045
This device can automatically test resistors, diodes, capacitors (with ESR value), transistors, thyristors, etc.
http://www.ebay.co.uk/itm/271479255045
This device can automatically test resistors, diodes, capacitors (with ESR value), transistors, thyristors, etc.