@rip_imho dont worry there's a ready supply in the Elemental Plane of Bones
@TetraspaceGrouping pray tell how to retrieve the needed components!
@rip_imho so first up your material component is a vial worth 500 gold, that's the focal point of your summoning, filled with bone dust. this is basically used for telling your mana "find the nearest source of bones", which if you're doing an order-whatever dimensionalist conjuration that constrains it to be extraplanar (see the tome Sarvarius et al, 3015 AT, available in many towers) is gonna be the plane of bones
@rip_imho then once you've done this bootstrap up to key your mana to the plane itself its time for some classic telekinesis - yeah its through the Magevoid but the principle is the basically the same, its DC mana so this just works. use your favorite tunnel stabilisation pattern to keep law+ operating, i prefer two-loop countervorticing because it's self-stabilising but i have high mana reserves and don't need to do it that often so YMMV
@rip_imho also to clarify i'm coming at this from an arcane background, if you're divine or natural i think it works broadly the same way but definitely a good idea to check with your god