Hi! Those are some tricky ponies . . . I don't know enough about MIB ponies to know off the top of my head, though I do know MIB ponies tend to cost a lot. Here are the ones I found on Ebay's completed listings as examples:
Ringlets, $125 Buy-It-Now
Pony Bride, $74.99
Some of the ponies you mentioned are rare because they were only released in certain countries in Europe and might be hard to find MIB. But you never know, and if you're determined to find them MIB and they're worth it for you to wait for them to come up, you might find them.