Role Links

Yes, this can be done using binding files

You need to export the bindings from a machine with the parties and role links defined.

You may need to export bindings not related to an assembly to get the parties.

You should end up with something like this:
[code:1:d5d1f6e7a4]<BindingInfo …>
<ModuleRefCollection>
<ModuleRef …>
<Services>
<Service Name=\"ServiceName\">
<Ports>
<Port …/>
</Ports>
<Roles>
<Role Name=\"Forward\" RoleLinkTypeName=\"Supplier.PurchaseOrder.PurchaseOrderType\" RoleType=\"Uses\">
<EnlistedParties>
<EnlistedParty Name=\"Joe Smith Corp\">
<Mappings>
<Mapping PortTypeName=\"Supplier.PurchaseOrder.SendPurchaseOrderType\" OperationName=\"Send\">
<SendPortRef Name=\"PurchaseOrder Via Hub\" />
</Mapping>
</Mappings>
</EnlistedParty>
</EnlistedParties>
</Role>
</Roles>
<Host Name=\"BizTalkServerApplication\" NTGroupName=\"BizTalk Application Users\" Type=\"1\" />
</Service>
</Services>
</ModuleRef>
</ModuleRefCollection>
<SendPortCollection>
<SendPort Name=\"PurchaseOrder Via Hub\" IsStatic=\"true\" IsTwoWay=\"false\">
</SendPort>
</SendPortCollection>
<DistributionListCollection />
<ReceivePortCollection/>
<PartyCollection>
<Party Name=\"Joe Smith Corp\">
<Aliases>
<PartyAlias Name=\"Organization\" Qualifier=\"OrganizationName\" Value=\"Joe Smith Corp\" IsAutoCreated=\"true\" />
<PartyAlias Name=\"Supplier Identifier\" Qualifier=\"PMSupplierId\" Value=\"368440\" IsAutoCreated=\"false\" />
</Aliases>
<SendPorts>
<SendPortRef Name=\"PurchaseOrder Via Hub\" />
</SendPorts>
<SignatureCert xsi:nil=\"true\" />
<CustomData xsi:nil=\"true\" />
</Party>
</PartyCollection>
</BindingInfo>[/code:1:d5d1f6e7a4]