I just got the ones that @Mather recommended and they are great. Fit Tone Poets perfectly. They ship to the US for orders over $50 and I think are similar price to the Sleeve City 5.0 outers.
I usually don’t have any issues with Invest In Vinyl outer sleeves fitting everything that includes most tip-on and Gatefold LPs.
I use the ClearBags double outers for gatefolds Crystal Clear Album Sleeve 12 15/16" x 12 15/16" 100 pack BLPDNF Double-album protective outer sleeves without a flap for Double LP Album Covers. Clear plastic sleeves protect record covers. www.clearbags.com