Loft or bunk over a double/full bed

[Anonymous]

I have a convertible crib/toddler bed that I will transition into the full bed soon.
I want to get a lift to go over. Can anyone recommend what they have done in this case?
I see lots of lofts on sale online, but not sure if any are actually designed to go over a full bed. I also want to preserve the look of the bed; it's got a pretty white headboard...so any with a bit of style would be good.