Also at EB Games....

MP-45 Bumblebee Version 2

MP-46 Blackarachnia

The interesting thing is that the Zing listings both have the Springfield store in Brisbane as having one of each available for collection as the only store in Australia allowing click-and-collect... and yet the EB Games listings don't have them available at any store for collection. It just doesn't seem to allow you to do a pick up from stores, so you can only order these to be posted to you.
Maybe you can go to a store in person and have them order these in to the store, and maybe that's how the Springfield store ended up with a set (someone ordered them, but then didn't pick them up, or returned them within 7 days for a refund).
I might go to my nearest store and ask if they are able to order them in, as shipping is an extra $6.











As for how the prices compare - they both convert to about full Japanese retail pricing (before shipping), so not exactly a price-gouge, but as some Asian & Japanese online stores have discounts, shop around, if you want either of these, and see if they are still available overseas.
HLJ currently have both in stock, with 20% off... but with postage and GST, the EB Games price for Bumblebee is probably cheaper, however it is probably still cheaper to buy Blackarachnia from HLJ (with GST and postage).