Any reason why you can't just have laminated vinyl printed removing the need for a plexi cover?
Pretty sure you can't get 1" t-molding but if it does exist it will probably be very expensive in pink. Probably cheaper to recut your control panel.
15mm MDF + Vinyl + 3mm Plexi and use 3/4" (19mm) t-molding
18mm MDF + Laminated vinyl and use 3/4" (19mm) t-molding