I've seen some trash bundles on eBay (maybe I shouldn't jump to that conclusion...but they're overpriced at best), but I'm not aware of any bundles available via component retailers. You should be able to put together a little sampler yourself, and it would certainly be cheaper--and better suited to bending--to do so. Maybe some others could jump in and suggest what you might put into that bundle, but here's my opinion (based on an order I placed this morning at allelectronics.com):
SPDT mini toggle switches
Momentary pushbuttons (a few NC, a number of NO)
Assortment of pots (100ohm-1M), but I have more pots of smaller value (5k and smaller), and only a handful of 500k and above.
These are the bare bones...I also order plenty of LEDs, jacks for patchbays, and so on. I usually have a budget in mind, then just add to my cart in order of importance.
Not sure if this is helpful, as you wanted a prepackaged bundle, but maybe this would help you bundle your own and save some cash.