Looking for help finding a natural pear diamond

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Where (who) would you turn for help finding a pear-shaped natural diamond? I'm looking for something eye-clean with good light performance around 2.5-3 carats with a >1.51 ratio, >12mm length, and <5mm height (prioritizing the length and width over height). And, at least SI1 and I color though I'm learning that may vary depending on which organization rated it with some being more conservative than others? It will be over a solitaire platinum band. My budget depends on where a good option starts but hoping not to spend more than $20k. If that isn't viable, let me know, and I'll try to adjust my expectations. What do you think my minimum budget should be to achieve a "good" (probably mostly meaning "eye-catching") result? Bonus thanks if you can share a link to a specific stone you'd recommend.