Veer Jee,
If you go to "Gurmat Pustak Bhandhaar" aka The Taksali Shop Chownk Ghanta Ghar Market right opposite Sri Harmandar Sahib you will be able to buy LaRivaar Senchis and Gutka Sahibs.
Senchis come in 2 sizes, I recommend the bigger size, they are very nicely decorated, bound, and printed. Pad-Ched ones have a matte finish, and the LaRivaar ones have shiny stars on, so be sure to get the right ones.
The only LaRivaar Gutka Sahib Taksaal has published is from Gyani Raam Singh Jee Sangrava, here is photo of it:
(The only LaRivaar Sundar Gutka is the one discussed in the other threads [
gurmatbibek.com] [
gurmatbibek.com] [
www.flickr.com] )
Also you can contact Master Jaswant Singh Jee who will be delighted to provide any LaRivaar Gutka Sahib he has published (at this moment I think that is Nitnem one (which has few extra Banis inside), Sri Sukhmani Sahib, Sri Asa Kee Vaar, and there was also plans to make Sri Sukhmana Sahib, and Bai (22) Vaar one, but I don't think they are available yet). The advantage of Master Jee's ones is that they personally painstakingly went to correct many common mistakes and anomalies from other Gutka Sahibs, and the mangla charan is always first.