Have a look at Union Kilts; they have a good range of non-traditional kilts in at reasonable prices. I have an acrylic Black Watch, a cotton Hunter Green Camo and a light blue Indi denim from them, all of which are great to wear.
I particularly like my workweight Freedom Cargo Kilt, in olive grey, but it was a bit more expensive, plus, being imported from Canada I had to pay an extra £35 for customs duty and VAT and £15 handling charge to the post office for collecting the customs duty and VAT - nearly enough in extra charges to have paid for another Union Kilt!