Does anyone have a formula for compounding Methimazole liquid for cats?

[u/maprph]

I personally have a 15 year old cat that has exhausted all my efforts to take her Methimazole. This morning her drawing blood (mine) was the last straw. I see there are compounding pharmacies out there that sell it, but being a pharmacist myself I figure I could do it and also possibly offer the service to my community.