I made my own. You can download a PDF from
https://hemdian.com/traveller/book1/referee-screens/ (there are a few variations). Since I use the T5.1 Landscape version in my own campaign, be aware I use an opposed roll for melee combat rather than the standard rules in the book and that version of the screens reflect this.
I used some black artist boards (from a local hobby shop), joined them together using duct tape, and mounted some transparent document protectors ... these hold the printed PDF pages. You could just use cardboard, tape, and glue ... but here's how mine turned out:
View attachment 4173