Eventually the Celtics had to get a guy to fill Bias' spot on the team and the hope was to get someone who played similarly. (TB Tangent: Wishful-thinking picking up someone off the scrapheap to emulate Len's skills. Reminds me of when the Bulls filled in for Michael Jordan with Pete Myers when MJ retired in 1993).
Although there was talk about them petitioning the league for restitution in the form of an extra first round draft pick in the following year's draft, it doesn't look like the Celtics ever formally did. With all the success the Celtics and Red Auerbach had in winning 16 titles in 30 years you could bet there was enough ill-will from rival general managers in the league to stick it to the Celtics when they could.