Notwithstanding the provisions of Kan. Stat. Ann. §§ 74-4913 and 74-4919f to the contrary, an employee who became a member of the Kansas public employees retirement system on July 1, 1975, who was a former member of the retirement system for Kansas official court reporters from September 24, 1962 to October 31, 1969, and who forfeited such service credit by withdrawing contributions on deposit on December 3, 1969, may elect to purchase credit for such service as though it were forfeited service under the Kansas public employees retirement system. Such purchase shall be by means of a lump sum payment as provided in Kan. Stat. Ann. § 74-4919f. The election to purchase and payment must be made within six (6) months of the effective date of this act.