You don't need a huge press for bending the flats... 3-ton or larger will do it. The advantage with the 12-ton to 20-ton press is that you can also press your barrels, headspace, do rivets, etc... The small presses will not do that.
Look at your local hardwares or farm supply places, or similar shops and you will find them. Harbor freight often puts their 12-ton press on sale for $99 and shipping on that is only $10 as I recall...
http://www.harborfreight.com/cpi/cta...emnumber=33497
HF also sends out 20% off coupons via e-mail every month or so and if you get one of those the price is down around $90 shipped for a new 12-ton H-press.
As for a vise, the jig is pretty darned large so unless you have a huge vise I doubt it will work well for you and frankly here again I request that the tools be used the way they were supposed to be used or I am really not willing to rent them. It isn't fair to the next person in line and it sure isn't fair to me when the tools get damaged.