Doesn't Bayer Advanced Disease Control for Roses etc. have tebuconazole as the active ingredient? That comes up at US$23 for enough to make 42 gallons according to one Google result (I have problems with these searches sometimes because I get automatically switched to Canada and a lot of pesticides you can get there are not permitted for homeowners here).
I find I have to watch Amazon, sometimes the prices are actually very high compared to elsewhere.
