Perhaps I'm confused... generally speaking, making it reef ready means you are planning to drill it & incorporate a sump/refugium filtration system below the tank in the stand. However, perhaps you have misunderstood the terminology & have no plans to drill your tank.
If this is the case, you could spend some $$$ and purchase a CPR Backpack. They are designed for HOB refugiums & come in small, medium, & large sizes. I have had one in the past & it grew chaeto like crazy!
Or you could go cheap & turn a HOB filter into a refugium.... just put some sand & chaeto in it & a small light over it. Several people do it & I'm sure you could search HOB Refugium here or on RC (Reef Central) for more ideas.