Alternatives to SPX for Credit Spreads?

I been trading 0DTE - 5DTE credit spreads with SPX for a while, having a lot of success due to the high win percentage strategy. I was recommended NDX, for better premium but I dislike that the legs need to be 10 dollars wide due to the high stock price. Is there an alternative for European style options indexes, with better premiums (or at least equal to SPX) and a low enough stock price? Thanks a lot for any answers. I am still very new to this.