Check the Nord Acoustics offerings; they have amplifiers based on NCore modules within your budget.
https://www.nordacoustics.co.uk/product-page/nord-one-se-nc500dm-mkii-dual-mono-stereo-amp
https://www.nordacoustics.co.uk/product-page/nord-one-se-up-nc500mb-mkii-mono-block-single
Or the W4S ST-1000 mkII based on ICE module if you prefer to buy American.
https://wyred4sound.com/products/power-amps/stereo/st-mkii-series
https://www.nordacoustics.co.uk/product-page/nord-one-se-nc500dm-mkii-dual-mono-stereo-amp
https://www.nordacoustics.co.uk/product-page/nord-one-se-up-nc500mb-mkii-mono-block-single
Or the W4S ST-1000 mkII based on ICE module if you prefer to buy American.
https://wyred4sound.com/products/power-amps/stereo/st-mkii-series