Hi, I don't know where you're based but if you're in Scotland the best of the best 'trews' or tartan trousers are made by Andrew Livingston at Livingston Tailors in Castle Douglas in South West Scotland. He is one of the finest tailors in the UK and he will make your trews in any style you like - seams or no seams - in the cloth of your choice. I've no idea what you'd pay for a pair of his trews nowadays but I know you'll be unlikely to find better ones.