I made my 20 long fuge and its been great for the past 3 years.
Just get some glass panes from Homedepot, glass cutting tool, some sand paper and aquarium sealant. Research some designs and you can easily make your own. Some tips, unless your protein skimmer is creating a crazy amount of micro bubbles, two bubble trap baffles are not really needed, one will work perfectly right before the return pump or right after the skimmer.