I agonised quite a lot over the controls, took me ages to actually settle on the combo I went with. It was frustrating, because the temperature controller is EXACTLY what is needed, and between the fridge and the 100w heater, I have a temperature range of around 0o
C (maybe less, but don't want to stress the old fridge!) up to around 35o
C. BUT, there just doesn't seem to be a similar controller available for humidity, one that will allow you to program a set point and a dead zone so that it will either humidify OR dehumidify OR sit tight with both off until one or the other is needed again according to the tolerance you've set. So, hence the 2 separate humidity controllers.
Anyway, I used the following place for some of the stuff, the internal mechanical hygrostat, the PTY heater, the DIN rail and some of the wiring supplies:http://uk.rs-online.com/web/search/searchBrowseAction.html?method=browseSection&Ne=4294957561&N=4294965055
The above have a presence in the US under the following company:http://www.alliedelec.com/
I used this place for the temperature and digital humidity controllers:http://www.forttex.com/
My humidifier is this one... it's really good, as it is adjustable from a fog down to a barely discernible wisp of vapor coming out:http://www.kaz-europe.com/cool-mist-vh5000e/
The fan is just an AC computer enclosure fan. I had wanted everything to run on mains level voltage for convenience. Unfortunately, when I went to wire in the little PTY heater, it turn out the fan on it was 24v (switchable DC or AC). So I ended up having to wire it into a 220 --> 24v AC to AC transformer. The nice thing about that heater is the fan is run independantly. It's tiny, but provides just enough air flow to keep the air moving slightly inside the chamber when it's closed. Of course, when the exhaust fan kicks in, the whole unit will get it's air replaced...
The fridge is what's referred to over here (UK) as a larder fridge... no freezer. They're fairly common, and this particular one didn't have much wasted space inside, especially at the bottom where the compressor sits. You do also get the regular fridges with both fridge and freezer... but they are still only around 55-60cm wide, and this form factor is kind of standard for Europe. The wide style North American fridges are available, but not as common and very expensive over here.
As for Prosciutto... well, the sky's the limit really! It's a pretty massive time commitment.... at least a year, possibly up to 3! I've already warned my wife that when we move back to Canada and have LOTs of space, I'm going to have one of these for fermenting, one for curing and one for long-term storage