These might help a bit:
24 Bars of a simple I-IV-V in A:
PDF Guitar Pro
12 Bars of a similarly simple I-IV-V with a bit more of a swing:
PDF Guitar Pro
12 Bars of II-V-I for a bit of variation:
PDF Guitar Pro
You'll find that you can mix 'n' match measures from all three & nail 'em together as you see fit. As time goes on, you'll develop a mental 'lick library' of your own - the more you've got to draw on, the less repetitive your lines will be.
Here's 4 1/2 minutes of near perfection - Oscar Peterson and Count Basie on multiple pianos & the sickeningly talented Niels-Henning Ørsted Pedersen on bass.
Slow Blues
NHØP's bassline is sublime in this, he scarcely repeats himself
once. Transcribe that & you'll be all the better for it.
Pete.