I am very prone to akathisia but the combination of Gabapentin and high doses of Vitamin B6 (plus a general B complex) has erased akathisia almost entirely, until it is very infrequent and barely noticeable.

Gabapentin is also known to improve sleep architecture. I just do not know if Gabapentin is accessible for you, now that it is increasingly treated almost as a controlled substance. However... if Valium is accessible, so should be Gabapentin. And Gabapentin is a far more benign drug than Valium.