Amazon has the Duck Brand Foam Handle Tape Gun With Clear Packaging Tape, 1.88 Inch x 54.6 Yard (669332) for $5.96, save 5% with 5 items on Subscribe & Save.
Reviews are mixed but I’ve been using this one for years and liked it better than the similar but highly rated Uline tape gun which is currently twice the price. That one felt a little awkward to me.
http://www.amazon.com/gp/product/B0058I1R0Q