My king's pretty but only has 500 stats and he has no mutation, so I'm looking to stat/mutie replace him.

Here's what I'm looking for:
- Svelte or harlequin pie; I might take slender, bisected, or symmetrical
- 800+ stats; would prefer 1000+ but I'm not gonna get greedy
- No more than 4 years old
- Sex-changeable if female

What I pay will depend on the piebald variation and the stats, but I would prefer not to spend more than 40 GB.