where can I find women's bathing suit bottoms that look like boy-shorts?

I'd try looking online first. That'll give you a quick idea of what style of boy-shorts you want.

Check out this link:
http://www.bizrate.com/womensswimwear/products__keyword--boy short swim suit.html

You could always buy male surf shorts and wear a normal bathing suit bottom under em.

Or get Roxy or O'neil surf shorts. They do them quite short too if you're looking for shorter ones.

delia's, american apparel

How much coverage do you want? Are you average-size or plus-size?
Eddie Bauer has these on sale: http://www.eddiebauer.com/eb/product.asp?product_id=30948&nv;=3|21473|21291|24446&lview;=&cm;_cg=C24446&tid;=&c;=≻=&lp;=w1i043

maybe j crew.

if you want to go the cheap route – check out target and old navy for sure. and the expensive route…. hmm, there’s a store called “everything but water” check it out online