I just installed Meprolight nightsights on my SP101 that I purchased used in mint condition last week. Ordered them from Brownell's and with my C&R FFL dealer discount I paid only $37. Also ordered another roll pin and a 1/16 brass roll pin punch. The roll pin punch made removal of the old original roll pin and sights very easy. I used my cordless drill to drill the hole through the new sights and was really surprised at how easy it was to do with just the hand drill. Start to finish in 20 min. The small roll pin holes in the barrel guides the 1/16 drill bit and if you go slow and easy it works just fine. The sights are relatively soft and drilled easily. The new Mepro's look and work great and are a huge improvement over the OEM ramp sight. I have Wolff Springs and wood grip inserts on the way.
I live about 10 minutes away from Gunners Ally who specialize in Don Hume leather so I rode over and picked up this IWB holster for $29. Its a nice unit for the money. Great service form the owners also.