Don't know the holder with this #. The 545i holder takes Kodak Readyloads and Fuji Quickloads, although it does not have a pressure plate and therefore cannot hold the film as flat as a genuine Kodak Readyload holder. The Polaroid holder is the only option if you need just ONE holder to take all three options - the Kodak and Fuji holders don't like each other's products and won't develop Polaroid film.
This is an 8x10" holder, and I've never heard of anyone using conventional film in one.
If you're looking for inexpensive 8x10" filmholders, look on eBay for wooden ones, which are generally around $15 a piece. I have mostly plastic ones--which will usually be newer and in better condition on the used market--but the wooden ones can be a good bargain and as long as they are not excessively worn or warped, they work just as well.