I know its so different in other countries
Up here people will sell Revolution in a single tube on craigslist or the rest of their box because their animal died or grew out of that size. May be best to phone around to clinics? Up here its technically illegal to sell it with out a vet visit because of the heartworm medication in the drug, but some clinics do it all the time. So I would imagine it would be easier and more likely for vets to do it down there.
If I knew the laws on importing stuff like that, I would sell you a box and ship it down there.
As per the ivermectin in pills, I cant answer that as I do not and have never used ivermectin. I only use Revolution (selamectin) because I know its super safe even at 20x the normal dose, super easy to get a hold of, and for me its really cheap.
Are there local dog forums for your country? do a search for some and make some posts on there to see if anyone would be willing to sell you some of either drug.
For now even if you can get the ear cleaner that will help break up the crusties and soothe everything going on in there as well as keep it happier until we can get something that will kill the mites (if that is the true issue) properly.
The issue with oil is it needs to be the right kind, right temperature, you have another rabbit (you still have Muli right?) and even after 3-4 weeks if you finally suffocate them in the bunny in question, the mites are still cruising around the cage, carpet, maybe they made their way to your other bunny from you, you finally dry out the foster bunnys ears from all the oil and the mites are like COOL! and come back. Issues like this need to be dealt with fast and properly. Especially since you have multiple animals. Dealing with the environment every day for more then a month is not fun. Dealing with an unfriendly bunnys ears every day for other a month, even less fun!
With revolution, in this case I would treat the rabbit at least twice, either once now and once again in 2 weeks (sooner doses are usually used in heavy infestations) or once now and again in 1 month. so really you're only touching the rabbit twice for this. and other then using ear cleaner to help clean out and break up the gunk in there, you're golden! No bunny fights for you
![Stick Out Tongue :p :p](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)