Willow leaf ficus is good for indoors, I've had more success with it than with other ficus varieties. There are some on ebay right now, though this isn't the best time of year to be shipping tropicals if you are in a northern location.
Perhaps the best bet would be to call Meehans and tell them what you're looking for, they might be able to send some photos.
Oh, and the juniper issue...despite what people say, you
can grow a procumbens indoors under light, though you might need more than 60 watts and it might take a while to get the watering and culture perfected. Google "Jack Wikle" if you want more information.
Edit to add - if you have to have something now and don't mind buying from bonsai boy (I have no experience with them), this might be a better deal than the one you posted:
http://www.bonsaiboy.com/catalog/product140.html
Not very exciting as a bonsai, but more reasonably priced for what you get, and something you could learn on. Biggest problem initially will be getting the conditions right (light, water, etc), and there's a good chance the first tree won't survive, so don't spend too much.
One other thing to keep in mind...the taller the tree you get, the harder it will be to keep it healthy indoors with limited lighting. Light intensity decreases rapidly from the source, so if you have only one weakish fixture (and 60 W is weakish) over an 18" tall tree, the bottom will not get nearly enough light...and those branches will weaken and eventually die. So you'd either need a stronger light, more fixtures, or (best option) go with a smaller plant.
