Hello, Ally!
This is definitely within our area of expertise! We do require that you submit a sketch or drawing of the custom clear acrylic box with all the measurements.
For an art instillation, we recommend our museum quality clear acrylic display cases. This material is higher quality, using a special glue that leaves all the joints virtually bubble free and shiny! A case like this has a longevity that will ensure you get your money's worth. These boxes are specially constructed for protecting and preserving artifacts, historic documents, exhibits, and art pieces. They are shatter-resistance, optically clear, and UV filtering as all as help keep water, dust, and bugs out.
Please let us know if this is an option you would be interested in!
Thank you!