This isn't really an infantry field gear question, and kinda faggy, but y'all are the biggest connoisseurs of cordura I can ask about this and there might be somebody on here that can make a recommendation.

I'm looking for durable folios that could hold an A5 hardbound, a fountain pen near 5/8" diameter, a mechanical pencil, and a Staedtler eraser. This company called Lochby appears to be a stationary hypebeast brand, but either of their "field folio" and "field journal" would fit my needs. Are there any alternatives I can consider that would be more economical?