Frustrating shopping trip

My front room is nearly finished. As it’s all brilliant white, I wanted to get some really bright curtains in primary colours, splodges of big shapes or flowers, all green red, blue and yellow.  I would know it it when I saw it! Well - John Lewis do not have curtain material in primary colours, not one of the thousands of rolls and samples.  I found one blue/green fabric which I liked, but it was £140 per metre!! I’ve put in the extra the only other one I liked that was affordable. Then I found one at Dunelm which I also quite liked, which is above.  I really don’t understand this. Anyhow, it’s most definitely what is often called a first world problem.  Anyone on here got any opinions?