A very gut-like version of weedwackers is the spiral cut Superior BassWorks Deluxe strings in dirty gut color... I've been using them on a 3/4 bass (Alcoa) for bluegrass and old jazz and I like the sound and feel of them a lot for both pizz and arco.
The SBW Deluxe strings are low-to-medium tension, feel and look like gut and most people who know anything about gut ask me if they're real.
For acoustic pizz, the E string (even the highest tension) does suffer from muddy-ness (typical thick low tension nylon string sound), less if you're playing close to the bridge, but the rest of the strings are clear and strong. For acoustic arco the whole set is clear, even and very growly like gut would be. These strings come as a 6-string bump-pack so you can decide your lowest-highest string tensions based on thickness. Set cost is $57.97 depending on where you get them (Amazon/SBW, etc.). They can be cut to length as needed, and they take about a week to settle in.
My bass has bridge wing and fingerboard piezo pickups and the whole set sounds great when plugged in direct for both pizz and arco. Last few weekends we've been recording for two new albums in the studio and we're really pleased with the sound, and when plugged into a PA for festivals, etc., we've also been very pleased.
There are a lot of strings to select from and I've only tried the SBW Deluxe string set and a mixed set (standard un-textured weedwackers with a red steel core A used as an E) that originally came with my bass. But of the two sets the SBW strings are definitely the best.