Reasonable solution to the Russia-Ukraine situation

For decades, everyone has been awqare that Russia wants a warm-water seaport with land access. That is why Russia took Crimea. Now they only want a "land bridge" to get there. It would seem that a 99-year land lease of a path along the border from Russia to Crimea would be a simple thing to negotiate. A fair price might be denominated in barrels of oil to eliminate the risk of currency inflation during that period. I wonder if the idea is on the table?